3,020 research outputs found
Postcard from Kantaro and Chiyo Matsubara, March
No full textA postcard from Kantaro and Chiyo Matsubara. It reported that they arrived at Narita Airport on March 15, safely returning from a trip to U.S. "生長の家 = Seicho no Ie."The Fuchita Family Collection contains one photograph album with newspaper clippings compiled by Kuni Yasumura Fuchita. Subjects include the Manzanar incarceration camp, Buddhism, the Koyasan Buddhist Temple, Ikebanas, Japan, and Japanese Americans. Credit line: Japanese American National Museum (Gift of Lynn T. Akamine, 2005.163.25). The collection was digitized and made accessible online by CSUDH Gerth Archives and Special Collections
Density Functional Study on the Mechanism of the Oxidative Addition of the Highly Polarized Sn−C σ-Bond to the (LH<sub>3</sub>)(L‘H<sub>3</sub>)Pd and (LH<sub>2</sub>C<sub>2</sub>H<sub>4</sub>LH<sub>2</sub>)Pd (L, L‘ = N, P, As, Sb) Complexes
No full textThe electronic effect on the activation mechanism of the highly polarized Sn−C σ-bond is
theoretically examined by means of a density functional method (B3LYP) using palladium
model complexes with various ligands, (LH3)(L‘H3)Pd and (LH2C2H4LH2)Pd (L, L‘ = N, P,
As, Sb). The author has recently reported a novel activation mechanism of the highly
polarized Sn−C σ-bond of SnH3C⋮CH in a previous paper (Matsubara et al. Organometallics
2002, 21, 4482−4489). The Sn−C σ-bond approaches the Pd perpendicularly to the P−Pd−P
plane of (PH3)2Pd, and the activation of the Sn−C σ-bond takes place by two steps via the
unique intermediate 2P, because the apical site of the palladium complex plays an important
role in the activation. When the phosphine ligand is replaced by the more σ-donative nitrogen
ligand or the chelate ligand, the mechanism is drastically changed, and the activation of
the Sn−C σ-bond occurs in the L−Pd−L‘ plane throughout by one step from the π-complex.
In contrast, in the case of the substrate SnH3(H)CCH2, the activation of the Sn−C σ-bond
starts from the π-complex independent of the ligands. However, the reaction proceeds by
the perpendicular approach of the Sn−C σ-bond with the support of the apical site, which
is accompanied by the clockwise or the counterclockwise rotation of the coordinated substrate.
It was found that the counterclockwise rotation, where the apical site effectively contributes
to the reaction, was energetically more favorable
In the matter of the conservation district use application of the Estate of James Campbell to permit as a conditional use the exploration and the development of geothermal resources within approximately 21, 943 acres of conservation district lands at Kahauale'a, Puna, Island and County of Hawaii : proposed findings of fact, conclusions of law, order, exhibit "A," table A, figure I, certificate of service
No full textCUDA No. HA-3/2/82-1463. This matter concerns a Conservation Use Application (hereinafter "CDUA"), filled with the Baord of Land and Natural Resources, State of Hawaii, (hereinafter "BLNR"), on March 2, 1982, to allow as a conditional use, the exploration and development of 21, 943 acres of land in the Limited (L) Subzone of the State Land Use Conservation District for the production and conversion into electricity of 250 megawatts of geothermal energy
Short- and long-term operation of the lutein-epoxide cycle in light-harvesting antenna complexes
No full textThe lutein-5,6-epoxide (Lx) cycle operates in some plants between lutein (L) and its monoepoxide, Lx. Whereas recent studies have established the photoprotective roles of the analogous violaxanthin cycle, physiological functions of the Lx cycle are still unknown. In this article, we investigated the operation of the Lx cycle in light-harvesting antenna complexes (Lhcs) of Inga sapindoides Willd, a tropical tree legume accumulating substantial Lx in shade leaves, to identify the xanthophyll-binding sites involved in short- and long-term responses of the Lx cycle and to analyze the effects on light-harvesting efficiency. In shade leaves, Lx was converted into L upon light exposure, which then replaced Lx in the peripheral V1 site in trimeric Lhcs and the internal L2 site in both monomeric and trimeric Lhcs, leading to xanthophyll composition resembling sun-type Lhcs. Similar to the violaxanthin cycle, the Lx cycle was operating in both photosystems, yet the light-induced Lx --> L conversion was not reversible overnight. Interestingly, the experiments using recombinant Lhcb5 reconstituted with different Lx and/or L levels showed that reconstitution with Lx results in a significantly higher fluorescence yield due to higher energy transfer efficiencies among chlorophyll (Chl) a molecules, as well as from xanthophylls to Chl a. Furthermore, the spectroscopic analyses of photosystem I-LHCI from I. sapindoides revealed prominent red-most Chl forms, having the lowest energy level thus far reported for higher plants, along with reduced energy transfer efficiency from antenna pigments to Chl a. These results are discussed in the context of photoacclimation and shade adaptation
Short- and long-term operation of the lutein-epoxide cycle in light-harvesting antenna complexes
No full textThe lutein-5,6-epoxide (Lx) cycle operates in some plants between lutein (L) and its monoepoxide, Lx. Whereas recent studies have established the photoprotective roles of the analogous violaxanthin cycle, physiological functions of the Lx cycle are still unknown. In this article, we investigated the operation of the Lx cycle in light-harvesting antenna complexes (Lhcs) of Inga sapindoides Willd, a tropical tree legume accumulating substantial Lx in shade leaves, to identify the xanthophyll-binding sites involved in short- and long-term responses of the Lx cycle and to analyze the effects on light-harvesting efficiency. In shade leaves, Lx was converted into L upon light exposure, which then replaced Lx in the peripheral V1 site in trimeric Lhcs and the internal L2 site in both monomeric and trimeric Lhcs, leading to xanthophyll composition resembling sun-type Lhcs. Similar to the violaxanthin cycle, the Lx cycle was operating in both photosystems, yet the light-induced Lx --> L conversion was not reversible overnight. Interestingly, the experiments using recombinant Lhcb5 reconstituted with different Lx and/or L levels showed that reconstitution with Lx results in a significantly higher fluorescence yield due to higher energy transfer efficiencies among chlorophyll (Chl) a molecules, as well as from xanthophylls to Chl a. Furthermore, the spectroscopic analyses of photosystem I-LHCI from I. sapindoides revealed prominent red-most Chl forms, having the lowest energy level thus far reported for higher plants, along with reduced energy transfer efficiency from antenna pigments to Chl a. These results are discussed in the context of photoacclimation and shade adaptation
Optimal Gaussian metrology for generic multimode interferometric circuit
No full textBounds on the ultimate precision attainable in the estimation of a parameter in Gaussian quantum metrology are obtained when the average number of bosonic probes is fixed. We identify the optimal input probe state among generic (mixed in general) Gaussian states with a fixed average number of probe photons for the estimation of a parameter contained in a generic multimode interferometric optical circuit, namely, a passive linear circuit preserving the total number of photons. The optimal Gaussian input state is essentially a single-mode squeezed vacuum, and the ultimate precision is achieved by a homodyne measurement on the single mode. We also reveal the best strategy for the estimation when we are given L identical target circuits and are allowed to apply passive linear controls in between with an arbitrary number of ancilla modes introduced
Optimal Gaussian metrology for generic multimode interferometric circuit
No full textBounds on the ultimate precision attainable in the estimation of a parameter in Gaussian quantum
metrology are obtained when the average number of bosonic probes is fixed.We identify the optimal input
probe state among generic (mixed in general)Gaussian states with a fixed average number of probe
photonsfor the estimation of a parameter contained in a generic multimode interferometric optical circuit,
namely, a passive linear circuit preserving the total number of photons. The optimalGaussian input state is
essentially a single-mode squeezed vacuum, and the ultimate precision is achieved by a homodyne
measurement on the single mode.We also reveal the best strategyfor the estimation when we are given L
identical target circuits and are allowed to apply passive linear controls in between with an arbitrary
number of ancilla modes introduced
“Everybody’s Treasure: The Takata-Matsubara Embroidery Project” and Its Meaning ―From the Perspective of Sharing “Livelihood Culture”―
No full textAt the Setagaya Art Museum in Setagaya-ku, Tokyo, from March 5 to March 10, 2019, eight years after the Great East Japan Earthquake, the exhibition “Remember the 3/11 Great East Japan Earthquake: Thinking from Setagaya” was held. It featured embroidery by Hiroko Amano & thirty-one tapestries on which in total 741 embroideries by residents of disaster area and the other participants were arranged. Each piece was stitched with pine trees according to the common theme ‘our lost memorial pinewood.’ They were inspired by Amano who prompted this project.
Firstly, this report describes the background of the launch of the project. Secondly, the author summarizes the feelings reflected in the pine tree tapestries of the disaster area, Takata-Matsubara in Rikuzentakata City, Iwate Prefecture. Thirdly, the author clarifies the role of students’ involvement in this project. The author goes on to examine the significance of embroidery as handwork from the viewpoint of sharing “livelihood culture.” The author concludes that this exhibition is related to social issues and is an example of shared “livelihood culture.”departmental bulletin pape
Elucidating the photosynthetic responses in chlorophyll-deficient soybean (Glycine max, L.) leaf
No full textChlorophyll (Chl)-deficient plants can potentially increase global surface albedo of mono-cropping systems, and simultaneously maintain a similar photosynthetic efficiency by increasing light canopy penetration and thus lowering investment in pigments. However, some previous studies have shown that pale mutants might reduce productivity in field conditions. Such lower yields were suspected to be due to loss of photosynthetic efficiency at leaf level during light fluctuations as a consequence of reduced capacity and slower relaxation of non-photochemical quenching (NPQ) of Chl fluorescence. In this paper, we tested this hypothesis by comparing, CO2 assimilation (A), photosystem II (PSII) efficiency (ΦPSII), photochemical quenching and NPQ, electron transport rate (ETR) and fluorescence yield (Fyield) in a green soybean (Glycine max L.) cultivar (Eiko) and in a Chl-deficient (MinnGold) mutant under dynamically fluctuating light conditions. MinnGold had significantly slower induction of ETR and lower A and ETR than Eiko, but there was little difference in ΦPSII between the two genotypes, suggesting that the lower photosynthesis of MinnGold was mainly due to lower light energy absorption by a Chl-deficient leaf. The NPQ capacity was also smaller in MinnGold than in Eiko. As for the kinetics of the rapidly inducible component of NPQ, MinnGold showed slower induction, not relaxation, than Eiko. The combination of the effect of Chl-deficiency on lower photosynthesis, NPQ capacity and slower NPQ induction may explain the lower biomass accumulation of MinnGold in the field. Our physiological observations, combined with fluorescence kinetics, can serve as a basis to parameterize Chl content in modelling radiative transfer and photosynthesis for upscaling measures of plant and ecosystem productivity by a big leaf model
Derivation of the Lifshitz-Matsubara sum formula for the Casimir pressure between metallic plane mirrors
No full textInternational audienceWe carefully reexamine the conditions of validity for the consistent derivation of the Lifshitz-Matsubara sum formula for the Casimir pressure between metallic plane mirrors. We recover the usual expression for the lossy Drude model but not for the lossless plasma model. We give an interpretation of this new result in terms of the modes associated with the Foucault currents, which play a role in the limit of vanishing losses, in contrast to common expectations
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